The low rank tensor approach [1]} is designed based on the assumption that our solution at time \(t\)  has a low rank representation in the form of
\(f(x, v, t) = \sum _{l=1}^{r} \left(C_l(t) \ U_l^{(1)}(x, t) U_l^{(2)}(v, t)\right),\) 
